Since the mid-1900s, humans have been exerting an ever-increasing impact on the global nitrogen cycle. Human activities ... Increases in available nitrogen can alter ecosystems by increasing ...

Here we report the profound and yet uncertain consequences of the human imprint on the phosphorus cycle and nitrogen ... imply an increase of the nutrient deficit in developing regions.

“Prior to the Industrial Revolution, nitrogen would cycle tightly within ecosystems. Through human activities ... “Nitrogen is considered the most limiting nutrient for plant growth in temperate ...

"With this model, we offer the most complete possible understanding of this cycle on a large ... lay in these direct human activities. First, it turns out that nutrient input through, for example ...

Humanity has thrown the global water cycle off balance “for the first time in human history,” fueling a growing water disaster that will wreak havoc on economies, food production and lives ...